Torque competition.

[SixPackBack]

Some of the young fella's on this site have more "pull' than a freight train...........owner operator's we know who you are
There ability to generate prodigous qauntities of torque, would see off even a rocket lll......as long as the race was staged over several inches

[unhingedlizard]

[QUOTE=Jim2]I'll say it again. I don't want it brought up again.

1. Two Strokes produce waaay more torque than four strokes of the same capacity and number of cylinders. It is the torque curve shape that is different.

[QUOTE]

Not true, the bike i learned to ride on (XR125) had more torque than my Aprilia RS125.

Had this Talk with a guy called Stan Stephens in britain. He says that a four stroke will ALWAYS make more torque than an equivelant two stroke, but if a four stoke was tuned to make the same power as a two, you wouldnt be able to get it off the line.

[White trash]

Not true, the bike i learned to ride on (XR125) had more torque than my Aprilia RS125.

Had this Talk with a guy called Stan Stephens in britain. He says that a four stroke will ALWAYS make more torque than an equivelant two stroke, but if a four stoke was tuned to make the same power as a two, you wouldnt be able to get it off the line.

That right? You ever ridden a 500cc 2 stroke crosser?

A 2 stroke engine fires every revolution of the crankshaft, a 4 stroke every second revolution. If a four stroke makes more torque, how come the largest, torquiest diesel engines on the plannet, those in ships, are 2 strokes?

Anyway, who gives a fuck.

Who the hell has the most torques in their bike here? Is it an inline four or a smelly v-twin?

[2_SL0]

WT quote " smelly v-twin?"

What do they smell of?

[GSVR]

yeah sorry for fucking your thread up Trashman.

As for my 1999 SV650 just refer to Riff Raffs posting and subtract around 5 hp. Though I reacon the total power output went up when I put on the Yosi exhaust due to the fact it has alot less restriction than the standard.

[Riff Raff]

Is it an inline four or a smelly v-twin?

Ah well if that's your opinion you don't have to ride my bike again!

Sorry, what did I hear you say before? Something along the lines of you actually really enjoy riding my bike, but don't let anyone else know?

[James Deuce]

[QUOTE=unhingedlizard][QUOTE=Jim2]I'll say it again. I don't want it brought up again.

1. Two Strokes produce waaay more torque than four strokes of the same capacity and number of cylinders. It is the torque curve shape that is different.

Not true, the bike i learned to ride on (XR125) had more torque than my Aprilia RS125.

Had this Talk with a guy called Stan Stephens in britain. He says that a four stroke will ALWAYS make more torque than an equivelant two stroke, but if a four stoke was tuned to make the same power as a two, you wouldnt be able to get it off the line.

You get off on talking shit, don't you.

T W O S T R O K E S M A K E M O R E T O R Q U E T H A N F O U R S T R O K E S.

My 465cc Stage II Stan Stephens kitted RG400 made twice the torque of a Honda CB550F of the same vintage. Twice. You on the other hand are discussing low RPM response, NOT torque. A two stroke of the same capacity and cylinder layout as a four stroke will always make more torque than four stroke. The pistons and crank are accelerated by combustion twice as often as a four stroke. The torque curve is utterly different than a four stroke though. Peak torque and HP tend to almost coincide on a well tuned two stroke giving that power band feel.

Read John Robinson's books. He explains it really well.

[Two Smoker]

WT quote " smelly v-twin?"

What do they smell of?

The v-twin im riding smells of oil... oil that is burning...

Personally i like the sound of a v-twin, but only at idle.... and who the fuck wants to ride a bike at idle all the time??? I LOVE THE SOUND of a crisp inline 4 600/750/1000 with a nice pipe on it.... mmmmm that bark....

[DEATH_INC.]

Just outta interest my turbo makes 111ftlbs (rw)at a pissy 15psi boost(the only dyno figures i got)but will run to 30psi....

Usually the reason why an engine is put in a v-series is to increase the bore size for a given stroke which increases the torque given at the expense of the speed of rotation of the crank (because a bigger piston is heavier etc). Hence v-series engines tend to have more torque at lower rpm.

Not true.A larger bore/shorter stroke makes more rpm,not more torque.It is all to do with piston velocities etc.

[unhingedlizard]

[QUOTE=Jim2][QUOTE=unhingedlizard]

I'll say it again. I don't want it brought up again.

1. Two Strokes produce waaay more torque than four strokes of the same capacity and number of cylinders. It is the torque curve shape that is different.



You get off on talking shit, don't you.

T W O S T R O K E S M A K E M O R E T O R Q U E T H A N F O U R S T R O K E S.

My 465cc Stage II Stan Stephens kitted RG400 made twice the torque of a Honda CB550F of the same vintage. Twice. You on the other hand are discussing low RPM response, NOT torque. A two stroke of the same capacity and cylinder layout as a four stroke will always make more torque than four stroke. The pistons and crank are accelerated by combustion twice as often as a four stroke. The torque curve is utterly different than a four stroke though. Peak torque and HP tend to almost coincide on a well tuned two stroke giving that power band feel.

Read John Robinson's books. He explains it really well.

Your highly tuned two stroke made more torque, well fancy that.
Lets leave it at you and i have different understandings of this ok? Getting personnal on an internet Chatforum isnt really my cup of tea.

Love how you can make ussumptions about me on the bases of two replies in an internet thread though.

[speedpro]

Just outta interest my turbo makes 111ftlbs (rw)at a pissy 15psi boost(the only dyno figures i got)but will run to 30psi....

Not true.A larger bore/shorter stroke makes more rpm,not more torque.It is all to do with piston velocities etc.

Gotta be careful here, that bigger bore results in a larger surface area of the piston crown which with the same combustion pressure will result in a greater force pushing the piston down the bore. (pressure per sq" X area). Depending on rod length etc it could actually end up with more torque. The shorter stroke allows more rpm, if the bigger bore results in the same torque the end result will be more power. Lots of variables though, and absolutley nothing to do with the reason this thread was started.

[Mooch]

The v-twin im riding smells of oil... oil that is burning...

Personally i like the sound of a v-twin, but only at idle.... and who the fuck wants to ride a bike at idle all the time??? I LOVE THE SOUND of a crisp inline 4 600/750/1000 with a nice pipe on it.... mmmmm that bark....

Yep , love the sound of those inlines ..... They remind me of those 70's Kung Fu movie voiceovers ....
kimosarbie ..... your going to die ......whooooooaaaw
Grasshoper .... take that ...... wheeeeeeeoooowwa



Give me the sound of a twin any day

[Brian d marge]

I was/wont wasnt going to ,,,,bugger it I am typing now ..going to reply to this thread ,,,

The figures posted originally are face value figures only ..as in .... oh thats nice isnt it ,,,

there has been a few thing posted since ,,so would like to clear up a few things

first Torque ,,, is an angular Moment ,,, ie ,,,,a moment is getting lucky with miss Firmthighs ,,,an angular moment is the same thing but in a Ford Anglebox ...
( or for engineers a moment is a force x a distance )

Force ... a pressure is a force divided over an area .N/mm^2 or Psi so a force is a pressure x an area ...

Power is the Rate at which Energy is used as in KW is 1k joues/sec as is the Energy used to run up some stairs is the same ,,but if you do it in 10 sec ,,,you have a higher power rate ...or over one week ,,same energy just used a lot slower ....

Joues is that funny fella down the black lion on Saturday ...

So for instantanous power before losses P = 2 x PI x N/60 xT ( where N is revs per sec...

Fly wheels have nought to do with accel of the bike , their Job is to store energy , which does a lot of other very important things such as give up it energy in order to get the piston over is dislike of compression ...as well as give up energy when rider is a wooos like me and wont open the thottle..so needs that nice soft .......( ie smoothed out due to less dramatic changes in the rotational speed of the flywheel) .........power delivery down low ...

One of the reasons for more cylinders is valve curtain area ,,,a single with 4 valve has Less valve curtain area ( the area around the outside of the open valve ) than a 6 cylinder with tiny weeny valves ....and you can accel small valves quicker ,,,which makes the N in 2 pi n t ,,,bigger........also smaller cylinders do a whole lot of other very important stuff a lot quicker to ..

A twin is also lighter , less frontal area ,,, etc etc thats why it was a V 5....

So once all the above has happened you pass all that energy along a chain to a whooping great lever ,,that just so happens to be round ,,,the longer the lever the less trouble the engine has in levering that great lump along the road ...a torque multiplyer as has been said already ..

Two stroke and 4 stroke

Two stroke are VERY good heat pumps ,,a 125 will intake about 185cc of mixture AND does this once every revolution ...BUT it can only keep the stuff in the cylinder when the pressure wave finally decides to turn up

...and they get on better than me an me missus ,,,.......at least they meet at a certain Rpm .......either side of that rpm you get leakage ,,,,,,and leakages arnt good ,,,anytime ...You can taper the pipe a bit to slow or speed up the pressure wave making it arrive over a wider Rpm range ( actually the temp of the gasses has more to do with its speed ,,,you can do alot in this reagion ,,rather than swap to expensive aftermarket pipes ..)

So it depends where you want your power ,,,,, me I love 2 smokes ...you can do so much with them,,,,,, like a violin ,,

the four stroke while filling the cylinder less ,,,it doesnt lose so much ,,,but it only does its business every 720 deg ....which is a lot easier for the tyre,,,and all concerned with power delivery ,,,,,So would feel more torquier over a wider range ( as the 2 smoke is suffering leakages !!)

But if a 2 stroke was set up to operate at the same rpm as a four stroke ..say 6000 or even 1000 rpm ,,,then the 2 smoke would be torqueier,,,, but once the losses got to much then the 4 stroke would still be doing its business...( that peak torque argument is valid here as it the shape under the torque curve ,,,,,,)

Oh you could bung a lot of gears into a 2 smoke motor in order to keep it in that torque curve ,,,,, then u call it ...Ito ...with 16 gears ??? was it????

Anyway Ive rambled to long and if the above bo%%&'X makes sence ,,then you are more pissed than I am ....( note to self Start drinking AFTER thinking ,,or is that before drinking ,,,one or the other !)

Stephen

[Waylander]

The next bike I plan on getting will have 103.8 foot pounds of torque at 3,500 RPM at the rear wheel. But I guess that doesn't count as I don't have it yet. We'll see in time though...

[TonyB]

man has this tread ever gone off track. At least Waylander understands what WT is trying to do. But I suspect Waylander is refering to a Warrior, which makes all that loverly torque by having lots of cubes.